Just a thought.
Butter molds are expensive but the 2 piece (front and back) cake molds are around $10.
The two cakes when done are put together, standing up, with icing. When the lamb is covered in icing , coconut can be put on all over, except the face to look like wool.
Smarties for eyes and green dyed coconut for grass that it's laying on.
Would make a lovely centerpiece for Easter and a great conversation piece to teach the children.